German aftermarket tuning company Brabus recently unveiled the 850 Roadster Edition of the 2013 Mercedes-Benz SL63 AMG. Upgrades include a new aero kit with a front splitter, hood scoop, rear diffuser and trunk-mounted spoiler. Its new twin-turbocharged V8 engine now boasts 850 HP and 1069 lb-ft of torque, an increase of over 300 HP and 479 lb-ft from the original. While the company has yet to release performance stats, the original already does 0-60 in 4.3 seconds and tops out at 155mph so we expect this to be in the running for the title of world’s fastest roadster.